Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb913e2c19dffdd…

MALICIOUS

PDF

59.3 KB Created: 2020-11-09 17:43:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e27a6c0f8db2f77831c3807d524a5c99 SHA-1: 16c4768e6fd1745b379077179628371bbf0e3492 SHA-256: 5fb913e2c19dffdd36e99c5b93052151970b710679b4a58458831ff649680a03
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it is a credential phishing lure impersonating Facebook, directing users to a malicious PDF. It also includes a phone number lure for callback phishing or tech-support scams. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://rifituxajigibik.weebly.com/uploads/1/3/4/5/134519767/vapobawev.pdf.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/strik?keyword=unblocked+electric+man PDF link annotation
    • https://rifituxajigibik.weebly.com/uploads/1/3/4/5/134519767/vapobawev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5f9e42fca72c1.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/ripuxozidajalixovon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464534/normal_5fa59b3236daa.pdfIn PDF document text
    • https://mulodunewumil.weebly.com/uploads/1/3/4/3/134314444/b7b6c.pdfIn PDF document text
    • https://zegimobigew.weebly.com/uploads/1/3/4/3/134313375/a3e1f1c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/78056634846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a343826-ceaa-46e4-8fb4-df8e4d20cfd6/jojufirevabi.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/introduction_to_information_systems_rainer.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/stellaris_biological_ascension_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB91 5104 bytes
SHA-256: c1ea692596b5b0ab64b0355b7d57233454443e4e08c6f33afadee724f3416eff
font_01_sfnt_off0000bcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD1 10932 bytes
SHA-256: 33f76e148976bfde7fdb17b47299c01ff2e7256edb66edcdf5bc6b696def0338

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